org.jetbrains.jet.lang.resolve.calls.inference.ConstraintsUtil Maven / Gradle / Ivy
/*
* Copyright 2010-2013 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.jet.lang.resolve.calls.inference;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.jet.lang.descriptors.TypeParameterDescriptor;
import org.jetbrains.jet.lang.types.*;
import org.jetbrains.jet.lang.types.checker.JetTypeChecker;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.*;
public class ConstraintsUtil {
@Nullable
public static TypeParameterDescriptor getFirstConflictingParameter(@NotNull ConstraintSystem constraintSystem) {
for (TypeParameterDescriptor typeParameter : constraintSystem.getTypeVariables()) {
TypeBounds constraints = constraintSystem.getTypeBounds(typeParameter);
if (constraints.getValues().size() > 1) {
return typeParameter;
}
}
return null;
}
@NotNull
public static Collection getSubstitutorsForConflictingParameters(@NotNull ConstraintSystem constraintSystem) {
TypeParameterDescriptor firstConflictingParameter = getFirstConflictingParameter(constraintSystem);
if (firstConflictingParameter == null) return Collections.emptyList();
Collection conflictingTypes = constraintSystem.getTypeBounds(firstConflictingParameter).getValues();
ArrayList